ADU Design & Permitting Near You in Anaheim, CA
If you’re searching for our ADU Design & Permitting services near you, Ellery ADU Studio is based in Anaheim and serves homeowners across Orange County and the surrounding inland communities. Every project starts with a written price before any work begins – no estimates that shift at signing, no designer-versus-builder finger-pointing down the road. Call (657) 366-5740 and a live person picks up, any hour of the day.
Nadia Ellery founded the studio in 2015, the same year California’s ADU permitting rules began shifting in ways that made attached and detached ADUs viable on lots where they’d been impossible before. Since then, Ellery ADU Studio has designed, permitted, and built more than 900 ADUs across Anaheim and nearby cities – every single one with a written price locked before the first drawing was produced, and a documented photo record delivered at every milestone.
The searcher who types “ADU design and permitting near me” usually has three things in mind: is someone actually close by, do they handle the permit themselves or hand it off, and what is this going to cost. We cover all three on this page.
What “Design-Build” Actually Means for Your Anaheim ADU
Most homeowners in Anaheim who’ve gotten a quote have already experienced the standard model: an architect or draftsperson does the drawings, hands them to a contractor, and the two parties operate under separate contracts. When something doesn’t match between the drawings and the field conditions – and in older Anaheim neighborhoods like West Anaheim or the Platinum Triangle area, something almost always does – each party points at the other. The project stalls. The homeowner pays twice to resolve it.
Ellery ADU Studio works under one contract that covers ADU Design & Permitting in Anaheim, construction, and final inspection sign-off. The drawings, the permit set, and the build are a single scope at a single written price. Under Haven Standard Clause 1, that price is in writing before any work starts. Under Clause 5 (No Surprises), the scope is locked at signing – no line items added at the door, no scope creep billed at the end.
That structure matters more in Anaheim than in some cities. Anaheim’s plan check process is handled through the Planning and Building Department, and the city’s setback rules, lot coverage calculations, and utility hookup requirements vary noticeably between neighborhoods. A Site Assessment prevents this: a permit set drawn without field knowledge of a specific address often comes back with corrections that cost weeks and money. Our team has processed permit sets for addresses throughout Anaheim – from single-story lots near Disneyland’s flight path restrictions to hillside-adjacent parcels in the northeast – and that local file history is part of what you’re buying.
Fast, Local ADU Design & Permitting
Anaheim is where our team is based, which means a site visit can typically be scheduled within a few business days – not weeks. We don’t operate a regional call center that dispatches someone from Los Angeles. When we walk your lot, we’re familiar with the block, the utility corridors common to that part of Anaheim, and the plan check preferences of the local reviewer.
After the site visit, preliminary drawings and a written project price are delivered before you’re asked to commit to anything. That’s not a courtesy – it’s Haven Standard Clause 1, in writing, on every project. Once you approve the scope and price, our Permit Application documents are submitted to the city. Our team manages all plan check responses and correction rounds; you don’t need to track down a separate permit expediter.
For homeowners who have already received a written estimate from another firm, we offer a Free Second Opinion at no charge. Bring the paperwork and we’ll tell you exactly what we see in it.
Areas We Cover
Our studio is rooted in Anaheim, and most of our active projects are within a reasonable drive of our office. We regularly work in Yorba Linda, where larger lot sizes often make detached ADUs feasible without a variance; Villa Park, where HOA & Zoning Compliance makes lot coverage rules stricter and the permit set needs to account for that from the first draft; Orange, where mixed zoning near the Old Town area creates some interesting conversion opportunities in existing garages; and Tustin, where infill development pressure has pushed a lot of homeowners toward junior ADUs and interior conversions as a faster path to approval.
We also serve Fullerton, Chino Hills, and Chino. Chino and Chino Hills sit in San Bernardino County rather than Orange County, which means a different building department and a different plan check timeline – something to understand before you start. We’ve run permit sets through both jurisdictions and know where the friction points are.
If your address is in one of these cities and you’re not sure whether your lot qualifies for the ADU type you have in mind, call (657) 366-5740. A live person answers – not a voicemail system – and can give you a preliminary read on zoning before you schedule anything.
What ADU Design & Permitting Costs in Anaheim
The honest answer is that total project cost depends on ADU type, square footage, site conditions, and the scope of utility work required. That said, here are the ranges we see most often for Anaheim-area projects, based on work completed since 2015. Every range below assumes a written price before work starts and drawings through final inspection sign-off.
| ADU Type | Typical All-In Range (Anaheim Market) | Notes |
|---|---|---|
| Junior ADU / Interior Conversion | $60,000 – $120,000 | Existing square footage; lower permit complexity |
| Garage Conversion ADU | $95,000 – $175,000 | Varies with existing slab depth, insulation, utility tie-ins |
| New Detached ADU (stick-built) | $175,000 – $320,000 | Lot size, setbacks, and foundation type drive the spread |
| Prefab / Modular ADU (installed) | $140,000 – $260,000 | Depends on manufacturer and site prep scope |
A note on the prefab line: Ellery ADU Studio specifies and coordinates systems from manufacturers including Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie products – all within the same single contract. Prefab doesn’t mean faster approval in Anaheim automatically; the city still reviews the plans, and site prep costs (grading, utility trenching, foundation work) are real line items that some prefab quotes leave out. We include them.
Design and permitting fees are a separate line item within the total written price, not billed as an open-ended hourly engagement. You see the number before you sign.
The 365-Day Done Right Promise
Once your ADU is built, the job isn’t finished for us until the finished unit matches the permitted drawings. If it doesn’t, Ellery makes it right – and that’s not a verbal commitment. It’s in writing before the project starts: the 365-Day Done Right Promise, part of The Haven Standard that governs every project we take on.
In Anaheim, where a new ADU can add $150,000 to $400,000 in assessed value depending on location and unit size, a written warranty backed by the people who both drew and built the project is a different kind of protection than a contractor’s handshake. Nadia Ellery put this in the standard contract because it’s the only arrangement that makes sense when one team controls both the drawings and the construction.
Key Takeaways
- Ellery ADU Studio is based in Anaheim and has been operating since 2015, with more than 900 ADUs designed, permitted, and built.
- One contract covers design, permitting, and construction – no separate designer and contractor to coordinate or arbitrate between.
- Every project starts with a written price under Haven Standard Clause 1. No “call for a quote” – the number is on paper before any work begins.
- Garage conversion ADUs in Anaheim typically run $95,000 – $175,000 all-in. Detached ADUs typically run $175,000 – $320,000.
- We serve Anaheim, Yorba Linda, Villa Park, Orange, Tustin, Fullerton, Chino Hills, and Chino.
- A Free Second Opinion is available on any written estimate you already have in hand.
- A live person answers calls at (657) 366-5740 at any hour – no voicemail queue.
- The 365-Day Done Right Promise is in writing before the project starts.
FAQs
How fast can Ellery ADU Studio start my project in Anaheim?
A site visit can typically be scheduled within a few business days of your first call. After the visit, you receive preliminary drawings and a written project price – both before you’re asked to commit to anything. The permit submission timeline from there depends on Anaheim’s current plan check queue, which we can give you a current estimate on when you call. Reach us at (657) 366-5740 – a live person answers at any hour, and an estimate is always free and always in writing.
Do you serve my area if I’m not in Anaheim proper?
Yes – we regularly work in Yorba Linda, Villa Park, Orange, Tustin, Fullerton, Chino Hills, and Chino, in addition to Anaheim. If your address falls outside those cities, call (657) 366-5740 and we’ll tell you directly whether we can take the project. We don’t maintain a waiting list for distant markets; if we can’t serve you well, we say so before you schedule.
How much does ADU design and permitting cost in Anaheim?
Design and permitting fees are included as a named line item in the total written project price – not billed separately as an hourly or open-ended fee. For context: garage conversion ADUs in Anaheim typically run $95,000 – $175,000 all-in, drawings through final inspection. Detached ADUs typically run $175,000 – $320,000 depending on size, foundation type, and utility scope. Junior ADUs and interior conversions start lower, around $60,000 – $120,000. Every quoted price is written before any work starts, per Haven Standard Clause 1. Call (657) 366-5740 for a project-specific written price.
Can I reach someone after hours if I have questions?
A live person answers calls at (657) 366-5740 at any hour of the day or night – no voicemail queue, no callback promise that may or may not materialize. After-hours calls are most often homeowners who’ve just received another firm’s estimate and want a second opinion before they sign. That second opinion is free. Bring the written estimate and we’ll review it with you on the spot.
Ready to Get Your ADU Project Priced in Writing?
If you’re weighing an ADU in Anaheim – or in Yorba Linda, Orange, Tustin, Fullerton, Chino Hills, or Chino – the first step is a site visit and a written price. Not a ballpark. Not a range that narrows once you’ve committed to a designer. A number, in writing, before any work starts.
Call (657) 366-5740 to schedule your site visit or to request a Free Second Opinion on a written estimate you already have. Nadia Ellery and the team at Ellery ADU Studio have been doing this work in Anaheim since 2015, and the permit set is always the core of what we deliver – not an afterthought. Visit our home page to see the full scope of services under one contract.
Written by Nadia Ellery, Owner at Ellery ADU Studio Anaheim, serving Anaheim and nearby areas since 2015.
What Our Customers Say
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."Garage conversion finished on the drawings and close to the schedule. They were honest that the sewer connection was the unknown, and it was."
- Arjun D."Handled the whole planning process. We went to one hearing and that was it."
- Rowena C.